Rank defect analysis and variance component estimation for inter-technique combination
Rank defect analysis and variance component estimation for inter-technique combination
复制标题
技术间组合的等级缺陷分析和方差分量估计
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
R. Kelm
中科院分区：
文献类型：
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作者：
R. Kelm
SINEX文件存储在IERS SINEX组合运动项目的SINEX池中，包含普通方程系统和/或单个空间技术的解决方案。在给定解的情况下，利用得到解的约束条件，尝试重构正规方程组。在组合前要确定每个正态方程矩阵的秩缺陷的个数和类型，以便了解约束特征。本文给出了秩缺陷分析的理论考虑和第一个数值结果。跨技术组合中的一个问题是输入法向方程系统的正确加权。方差分量估计可以看作是一种潜在的加权方法。这里报告了使用这种方法的第一次经验。
The SINEX files, which are stored in the SINEX pool of the IERS SINEX Combination Campaign project, contain normal equation systems and/or solutions of individual space techniques. When the solution is given we try to reconstruct the normal equation system by using the constraints with which the solution was obtained. Before the combination the number and type of rank defect of each normal equation matrix should be determined in order to get an insight of the constraint characteristics. Theoretical considerations and first numerical results for this rank defect analysis are presented here. One of the problems in the inter-technique combination is the correct weighting of the input normal equation systems. The variance component estimation may be considered as a potential weighting method. First experiences with this method are reported here.